Two types of viologen-linked porphyrin with different configuration
 between the porphyrin and the bonded viologen have been synthesized
 and Langmuir–Blodgett (LB) films prepared. The effects of the
 different configurations on the photoelectric conversion by indium tin
 oxide (ITO) electrodes modified with the LB films and on photoinduced
 hydrogen evolution, using the LB films and
 H
   2
 PtCl
   6
  as a catalyst in the presence of
 ethylenediaminetetraacetic acid (EDTA) as a sacrificial electron
 donor, have been investigated. No effect was detected for the
 photocurrent generation but photoinduced hydrogen evolution was
 dependent upon the configuration. These results show that the rate of
 diffusion of small electrolyte ions is the same in both LB films but
 diffusion of large EDTA molecules is affected by the configuration.
 Hence, the molecular structure of viologen-linked porphyrin must be
 taken into account in order to make diffusion of reactant in the LB
 film easy and thus to increase the reaction yield.
                                    两种
卟啉与结合的紫
精素之间具有不同构型(porphyrin and the bonded viologen have been synthesized)的紫
精素连接
卟啉已经合成,并制备了Langmuir-Blodgett(LB)薄膜。研究不同构型对
铟锡氧化物(ITO)电极的光电转换的影响(通过LB薄膜修饰),以及光诱导的氢化反应(使用LB薄膜和H2PtCl6作为催化剂,在
乙二胺四乙酸(
EDTA)作为牺牲电子供体的情况下)。没有检测到对光电流产生的影响,但光诱导的氢化反应取决于构型。这些结果表明,两种LB薄膜中小电解质离子的扩散速率相同,但大
EDTA分子的扩散受构型的影响。因此,必须考虑紫
精素连接
卟啉的分子结构,以使反应物在LB薄膜中的扩散更容易,从而提高反应产率。